.container {
    min-height: 100vh;
}
.header-img {
    margin: 0 auto;
    width: 150px;
    height: 150px;
    margin-top: 40px;
    margin-bottom: 30px;
}
.nick-name {
    width: 100%;
    text-align: center;
    font-size: 16px;
    font-weight: 700;
}
.btn {
    margin: 20px auto;
    width: 50%;
    padding: 10px;
    font-size: 14px;
    background-color: #4D682E;
    color: white;
    text-align: center;
    border-radius: 10px;
}